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Browsing by Author "Garibov, Emin"

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    Article
    Synthesis and Investigation of the Conversion Reactions of Pyrimidine-Thiones With Nucleophilic Reagent and Evaluation of Their Acetylcholinesterase, Carbonic Anhydrase Inhibition, and Antioxidant Activities
    (Wiley, 2018) Taslimi, Parham; Sujayev, Afsun; Turkan, Fikret; Garibov, Emin; Huyut, Zubeyir; Farzaliyev, Vagif; Gulcin, Ilhami
    The conversion reactions of pyrimidine-thiones with nucleophilic reagent were studied during this scientific research. For this purpose, new compounds were synthesized by the interaction between 1,2-epoxy propane, 1,2-epoxy butane, and 4-chlor-1-butanol and pyrimidine-thiones. These pyrimidine-thiones derivatives (A-K) showed good inhibitory action against acetylcholinesterase (AChE), and human carbonic anhydrase (hCA) isoforms I and II. AChE inhibition was in the range of 93.1 +/- 33.7-467.5 +/- 126.9nM. The hCA I and II were effectively inhibited by these compounds, with K-i values in the range of 4.3 +/- 1.1-9.1 +/- 2.7nM for hCA I and 4.2 +/- 1.1-14.1 +/- 4.4nM for hCA II. On the other hand, acetazolamide clinically used as CA inhibitor showed K-i value of 13.9 +/- 5.1nM against hCA I and 18.1 +/- 8.5nM against hCA II. The antioxidant activity of the pyrimidine-thiones derivatives (A-K) was investigated by using different in vitro antioxidant assays, including Cu(2+)and Fe(3+)reducing, 1,1-diphenyl-2-picrylhydrazyl (DPPH center dot) radical scavenging, and Fe(2+)chelating activities.
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    Synthesis of New Cyclic Thioureas and Evaluation of Their Metal-Chelating Activity, Acetylcholinesterase, Butyrylcholinesterase, and Carbonic Anhydrase Inhibition Profiles
    (Wiley, 2017) Taslimi, Parham; Sujayev, Afsun; Garibov, Emin; Nazarov, Nazar; Huyut, Zubeyir; Alwasel, Saleh H.; Gulcin, Ilhami
    In the presence of trifluoracetic acid (TFAA), an efficient method for the synthesis of tetra(hexa)hydropyrimidinethione-carboxylates has been used on the basis of three-component condensation of thiourea with its different aldehydes and -diketones. Some novel cyclic thioureas were synthesized, and their hCA I, hCA II, acetylcholinesterase (AChE), and butyrylcholinesterase (BChE) inhibitors and metal-chelating properties were evaluated. K-i values of novel synthesized compounds for AChE and BChE are in the range of 51.84-135.96 and 143.96-274.55 nM, respectively. Also, HCA I and II were effectively inhibited by these novel compounds, with K-i values in the range of 404.16-745.13 nM for hCA I and of 434.20-689.57 nM for hCA II, respectively. Additionally, acetazolamide (AZA), clinically used as a CA inhibitor, with a K-i value of 883.68 +/- 121.27 nM in hCA I and 1008.66 +/- 144.70 nM in hCA II. Also, tacrine inhibited AChE and BChE showed K-i values of 314.63 +/- 31.66 and 373.57 +/- 75.07 nM, respectively.